Home / 18,702,936.90-28,007,166.15-12,278,405.70

Finding the Fourth Proportional to 18,702,936.90, 28,007,166.15 and 12,278,405.70

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Solution

The fourth proportional to 18,702,936.90, 28,007,166.15 and 12,278,405.70 is: 18,386,596.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,702,936.90 : 28,007,166.15 = 12,278,405.70 : x
  2. Step 2: Convert to fraction form
    18,702,936.90/28,007,166.15 = 12,278,405.70/x
  3. Step 3: Cross multiply
    18,702,936.90x = 28,007,166.15 × 12,278,405.70
  4. Step 4: Simplify right side
    18,702,936.90x = 343,883,348,497,007
  5. Step 5: Solve for x
    x = 343,883,348,497,007/18,702,936.90
  6. Step 6: Final answer
    x = 18,386,596.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.